I upgraded my HTC Touch Pro to the latest MightyRom 5 which is running Windows Mobile 6.5 Build 21501. It gets rid of the HTC Touch Flo which really didn't work that well anyways with the stock Sprint ROM. Simply unlock your Sprint phone with the unlock application (just hook up phone via active sync and run ROM update to unlock). Then when the device reboots, power off the device by holding the power button; then press the power button and the volume down button to turn on the phone and you should be at an unlock screen with 3 colors. Then run the ROM update and enjoy.
Unlock Sprint below
Raphael_CDMA_HSPL_037.zip (1.27 mb)
Mighty ROM 5 below
MightyROM 5